1
Stuart A Haber, Wakefield S Stornetta Jr: Method for secure time-stamping of digital documents. Bell Communications Research, Leonard Charles Suchyta, Lionel N White, August 4, 1992: US05136647 (337 worldwide citation)

A system for time-stamping a digital document, including for example text, video, audio, or pictorial data, protects the secrecy of the document text and provides a tamper-proof time seal establishing an author's claim to the temporal existence of the document. Initially, the author reduces the docu ...


2
Stuart A Haber, Wakefield S Stornetta Jr: Digital document time-stamping with catenate certificate. Bell Communications Research, Leonard Charles Suchyta, Lionel N White, August 4, 1992: US05136646 (303 worldwide citation)

A system for time-stamping a digital document, for example any alphanumeric, video, audio, or pictorial data, protects the secrecy of the document text and provides a tamper-proof time seal establishing an author's claim to the temporal existence of the document. Initially, the document may be conde ...


3
Stuart A Haber, Wakefield S Stornetta Jr: Method of extending the validity of a cryptographic certificate. Bell Communications Research, Leonard Charles Suchyta, Lionel N White, December 13, 1994: US05373561 (209 worldwide citation)

A cryptographic certificate attesting to the authenticity of original document elements, such as time of creation, content, or source, will lose its value when the cryptographic function underlying the certifying scheme is compromised. The present invention provides a means for extending the reliabi ...


4
Stuart A Haber, Wakefield S Stornetta Jr: Method for secure time-stamping of digital documents. Bell Communications Research, Leonard Charles Suchyta, Lionel N White, May 30, 1995: USRE034954 (2 worldwide citation)

A system for time-stamping a digital document, including for example text, video, audio, or pictorial data, protects the secrecy of the document text and provides a tamper-proof time seal establishing an author's claim to the temporal existence of the document. Initially, the author reduces the docu ...